Border Cave, South Africa (~24 ka): bone arrowheads + a notched applicator with castor-bean residue (ricinoleic acid) and beeswax hafting—poisoned projectiles, complex chemistry. #PaleoPost #HumanOrigins #BorderCave #Poison
Paper: www.pnas.org/doi/10.1073/...

Stunning discovery of #GrassBedding at the #BorderCave site in #SouthAfrica's KwaZulu-Natal - dated to about 200,000 years ago.

L. Wadley et al., @ScienceMagazine 369(6505), 2020.

https://science.sciencemag.org/content/369/6505/863